L5P CCV Reroute System (6.6L Duramax Guide)
An L5P CCV reroute system is a crankcase ventilation upgrade designed for 2017–2025 6.6L Duramax diesel trucks. It redirects oil vapors and blow-by gases away from the factory intake system, helping reduce intake contamination and improve long-term engine cleanliness and reliability. In stock form, the L5P CCV system routes crankcase vapors back into the intake air horn. While...
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